Windows: Set DLL name accurately in StringFileInfo on Cygwin and MSYS2

Now the information in the "Details" tab in the file properties
dialog matches the naming convention of Cygwin and MSYS2. This
is only a cosmetic change.

src/liblzma/liblzma_w32res.rc

@@ -5,7 +5,15 @@
  */
 
 #define MY_TYPE VFT_DLL
-#define MY_NAME "liblzma"
+
+#if defined(__MSYS__)
+#	define MY_NAME "msys-lzma-5"
+#elif defined(__CYGWIN__)
+#	define MY_NAME "cyglzma-5"
+#else
+#	define MY_NAME "liblzma"
+#endif
+
 #define MY_SUFFIX ".dll"
 #define MY_DESC "liblzma data compression library"
 #include "common_w32res.rc"