Senselib FFI: Use devDesc object in SenseApiLib, also add per-device metadata to xcbXorg

We also had to write conversion constructors and so on to CSenseDeviceDesc.
The technical debt that's being piled up from this C FFI is excessive.
I think we'll end it here. API Libs will have to be written in C++
from now on. API Lib interfaces will be in C++.

We'll use cross compilers to ensure stability for out-of-tree lib
development.

hcore/include/senseApis/senseApiLib.h

@@ -32,7 +32,8 @@ public:
     SenseApiDesc() = default;
     SenseApiDesc(const CSenseApiDesc& cDesc)
     // The caller should sanity check before calling this constructor.
-    :   name(cDesc.name)
+    :   name(cDesc.name),
+        sal_mgmt_libOps(cDesc.sal_mgmt_libOps)
     {
         for (uint32_t i = 0; i < cDesc.numExportedImplexorApis; ++i)
         {
@@ -51,6 +52,7 @@ public:
     std::string name;
     // These are the implexors whose APIs this lib exports.
     std::vector<ExportedImplexorApiDesc> exportedImplexorApis;
+    Csal_mgmt_libOps* sal_mgmt_libOps;
 
     std::string stringify() const {
         std::string result = "Name: " + name + "\n";

hcore/senseApis/senseApiManager.cpp

@@ -123,7 +123,7 @@ SenseApiManager::getSenseApiLibByApiName(const std::string& apiName)
 {
     auto it = std::find_if(senseApiLibs.begin(), senseApiLibs.end(),
         [&apiName](const std::unique_ptr<SenseApiLib>& lib) {
-            return lib->getSenseApiDesc()->name == apiName;
+            return lib->senseApiDesc.name == apiName;
         }
     );
 
@@ -173,24 +173,24 @@ std::string SenseApiManager::stringifyLibs() const
 
 void SenseApiManager::initializeSenseApiLib(SenseApiLib& lib)
 {
-    if (!lib.getSenseApiDesc()->sal_mgmt_libOps->initializeInd)
+    if (!lib.senseApiDesc.sal_mgmt_libOps->initializeInd)
     {
         throw std::runtime_error(
             std::string(__func__) + ": initializeInd() is NULL for library '"
             + lib.libraryPath + "'");
     }
-    lib.getSenseApiDesc()->sal_mgmt_libOps->initializeInd();
+    lib.senseApiDesc.sal_mgmt_libOps->initializeInd();
 }
 
 void SenseApiManager::finalizeSenseApiLib(SenseApiLib& lib)
 {
-    if (!lib.getSenseApiDesc()->sal_mgmt_libOps->finalizeInd)
+    if (!lib.senseApiDesc.sal_mgmt_libOps->finalizeInd)
     {
         throw std::runtime_error(
             std::string(__func__) + ": finalizeInd() is NULL for library '"
             + lib.libraryPath + "'");
     }
-    lib.getSenseApiDesc()->sal_mgmt_libOps->finalizeInd();
+    lib.senseApiDesc.sal_mgmt_libOps->finalizeInd();
 }
 
 void SenseApiManager::initializeAllSenseApiLibs(void)
@@ -217,14 +217,14 @@ void SenseApiManager::attachSenseDevice(const SenseDeviceSpec& spec)
             + spec.api + "'");
     }
     auto& lib = libOpt.value().get();
-    if (!lib.getSenseApiDesc()->sal_mgmt_libOps->attachDeviceReq)
+    if (!lib.senseApiDesc.sal_mgmt_libOps->attachDeviceReq)
     {
         throw std::runtime_error(
             std::string(__func__) + ": attachDeviceReq() is NULL for library '"
             + lib.libraryPath + "'");
     }
     CSenseDeviceSpec cSpec(spec);
-    lib.getSenseApiDesc()->sal_mgmt_libOps->attachDeviceReq(&cSpec);
+    lib.senseApiDesc.sal_mgmt_libOps->attachDeviceReq(&cSpec);
 }
 
 void SenseApiManager::detachSenseDevice(const SenseDeviceSpec& spec)
@@ -237,14 +237,14 @@ void SenseApiManager::detachSenseDevice(const SenseDeviceSpec& spec)
             + spec.api + "'");
     }
     auto& lib = libOpt.value().get();
-    if (!lib.getSenseApiDesc()->sal_mgmt_libOps->detachDeviceReq)
+    if (!lib.senseApiDesc.sal_mgmt_libOps->detachDeviceReq)
     {
         throw std::runtime_error(
             std::string(__func__) + ": detachDeviceReq() is NULL for library '"
             + lib.libraryPath + "'");
     }
     CSenseDeviceSpec cSpec(spec);
-    lib.getSenseApiDesc()->sal_mgmt_libOps->detachDeviceReq(&cSpec);
+    lib.senseApiDesc.sal_mgmt_libOps->detachDeviceReq(&cSpec);
 }
 
 void SenseApiManager::attachAllSenseDevicesFromSpecs(void)