Fix unicode build issues on Windows

When building with unicode support, some Windows functions expect that
their input parameters are wide strings, which causes compilation
issues.

This commit fixes that by explicitly calling the narrow-string version
of the function.

shared/gpuopen/core/src/platforms/ddcWinPlatform.cpp

@@ -105,7 +105,7 @@ namespace DevDriver
             DD_UNUSED(lvl);
 
             // OutputDebugString routes to the debug output in Visual Studio
-            OutputDebugString(pStr);
+            OutputDebugStringA(pStr);
         }
 
         Result GetAbsPathName(
@@ -219,7 +219,7 @@ namespace DevDriver
 
             // We load the thread naming function dynamically to avoid issues when the current OS doesn't have
             // support for the function.
-            HMODULE hModule = GetModuleHandle("kernel32.dll");
+            HMODULE hModule = GetModuleHandleA("kernel32.dll");
             if (hModule != nullptr)
             {
                 // Attempt to load the function for setting thread names
@@ -470,7 +470,7 @@ namespace DevDriver
 
             if (pDir != nullptr)
             {
-                const BOOL ret = CreateDirectory(pDir, NULL);
+                const BOOL ret = CreateDirectoryA(pDir, NULL);
                 if (ret != 0)
                 {
                     // The directory did not exist, and was created successfully
@@ -691,7 +691,7 @@ namespace DevDriver
             /// Query the machine's hostname
             {
                 DWORD nSize = ArraySize<DWORD>(pInfo->hostname);
-                GetComputerNameEx(ComputerNameDnsFullyQualified, pInfo->hostname, &nSize);
+                GetComputerNameExA(ComputerNameDnsFullyQualified, pInfo->hostname, &nSize);
                 DD_WARN(nSize > 0);
             }
 
@@ -872,7 +872,7 @@ namespace DevDriver
                 DWORD isEnabled = 0;
 
                 HKEY hKey;
-                auto hResult = RegOpenKeyEx(
+                auto hResult = RegOpenKeyExA(
                     HKEY_LOCAL_MACHINE,
                     R"(SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock)",
                     0,
@@ -884,7 +884,7 @@ namespace DevDriver
                 {
                     DWORD valueSize = sizeof(DWORD);
 
-                    hResult = RegQueryValueEx(
+                    hResult = RegQueryValueExA(
                         hKey,
                         "AllowDevelopmentWithoutDevLicense",
                         0,