Fortran: Detect G95 compiler version

The __G95__ and __G95_MINOR__ preprocessor symbols encode the compiler
version as decimal digits.

Modules/CMakeFortranCompilerId.F.in

@@ -47,6 +47,8 @@
         PRINT *, 'INFO:compiler[Cray]'
 #elif defined(__G95__)
         PRINT *, 'INFO:compiler[G95]'
+# define COMPILER_VERSION_MAJOR DEC(__G95__)
+# define COMPILER_VERSION_MINOR DEC(__G95_MINOR__)
 #elif defined(__PATHSCALE__)
         PRINT *, 'INFO:compiler[PathScale]'
 # define COMPILER_VERSION_MAJOR DEC(__PATHCC__)