DISTS: Fix OpenGL renderer issue for builds with MSYS2/Mingw64 or MSY…

…S2/Mingw32

The issue pertains to MSYS2 adding a default manifest file (default-manifest.o) to the executable

The bug is for PC systems with GPU drivers that were not properly supported for Windows 10 systems, like
Intel HD Graphics series 1rst and 2nd generations. In those systems, launching a game in ScummVM (built with MSYS2/Mingw)
with the OpenGL renderer would cauase the game screen to be a white blank image, and various warnings would be output to the console:
eg.
"WARNING: GL ERROR: GL_INVALID_ENUM on glTexSubImage2D(0x0DE1, 0, 0, area.top, src.w, area.height(), _glFormat, _glType, src.gere.cpp:167)!"
This was due to MSYS2/Mingw builds trying to load the (poorly supported) GPU driver while advertising support for Windows 10 in their
embedded default Manifest file. Hence, the GPU driver dll (eg ig4icd64.dll) would be unloaded, causing the bug.
More information is available in the following links:
https://github.com/pal1000/save-legacy-intel-graphics
LWJGL/lwjgl#119
msys2/MSYS2-packages#454
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69880

dists/scummvm.rc

@@ -11,7 +11,9 @@
 #define IDI_ICON  1001
 #define IDI_COUNT 1002
 #define ID_GDF_XML __GDF_XML
+#define IDR_RT_MANIFEST1 1
 
+IDR_RT_MANIFEST1       RT_MANIFEST DISCARDABLE "dists/win32/scummvm.exe.manifest"
 IDI_ICON               ICON    DISCARDABLE     "icons/scummvm.ico"
 IDI_COUNT              ICON    DISCARDABLE     "icons/count.ico"
 
@@ -31,13 +33,13 @@ fonts.dat              FILE    "dists/engine-data/fonts.dat"
 #endif
 
 #if PLUGIN_ENABLED_STATIC(ACCESS)
-access.dat           FILE    "dists/engine-data/access.dat"
+access.dat             FILE    "dists/engine-data/access.dat"
 #endif
 #if PLUGIN_ENABLED_STATIC(CRYO)
 cryo.dat               FILE    "dists/engine-data/cryo.dat"
 #endif
 #if PLUGIN_ENABLED_STATIC(CRYOMNI3D)
-cryomni3d.dat               FILE    "dists/engine-data/cryomni3d.dat"
+cryomni3d.dat          FILE    "dists/engine-data/cryomni3d.dat"
 #endif
 #if PLUGIN_ENABLED_STATIC(DRASCULA)
 drascula.dat           FILE    "dists/engine-data/drascula.dat"
@@ -82,7 +84,7 @@ toon.dat               FILE    "dists/engine-data/toon.dat"
 wintermute.zip         FILE    "dists/engine-data/wintermute.zip"
 #endif
 #if PLUGIN_ENABLED_STATIC(XEEN)
-xeen.ccs         FILE    "dists/engine-data/xeen.ccs"
+xeen.ccs               FILE    "dists/engine-data/xeen.ccs"
 #endif
 #if PLUGIN_ENABLED_STATIC(AGI)
 pred.dic               FILE    "dists/pred.dic"

dists/win32/scummvm.exe.manifest

@@ -0,0 +1,9 @@
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="asInvoker"/>
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+</assembly>