release script: Revert DJGPP gcc version upgrade, due to build failures

Author: dkl

contrib/release/build.sh

@@ -151,8 +151,9 @@ dos)
 	}
 
 	djver=204
-	gccver=520
-	bnuver=2251
+	gccver=492
+	djgppgccversiondir=4.92
+	bnuver=225
 	gdbver=771
 
 	# binutils/gcc/gdb (needs updating to new versions)
@@ -326,7 +327,7 @@ EOF
 	cp lib/crt0.o lib/gcrt0.o lib/libdbg.a lib/libemu.a lib/libm.a fbc/lib/dos/
 	cp lib/libstdcxx.a fbc/lib/dos/libstdcx.a
 	cp lib/libsupcxx.a fbc/lib/dos/libsupcx.a
-	cp lib/gcc/djgpp/5.20/libgcc.a fbc/lib/dos/
+	cp lib/gcc/djgpp/$djgppgccversiondir/libgcc.a fbc/lib/dos/
 
 	cd fbc
 	make bindist TARGET_OS=dos DISABLE_DOCS=1
@@ -432,7 +433,7 @@ windowsbuild() {
 		;;
 	win64)
 		cp bin/gcc.exe fbc/bin/win64
-		cp --parents libexec/gcc/x86_64-w64-mingw32/5.2.0/cc1.exe fbc/bin
+		cp --parents libexec/gcc/x86_64-w64-mingw32/$gccversion/cc1.exe fbc/bin
 		;;
 	esac