[master] d3345a772 build: Quote percent signs in $VCC_CC

[Dridi Boukelmoune]

commit d3345a7728e2d618e6959fcb19ebb4cf9176008a
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Dec 7 08:40:11 2021 +0100

    build: Quote percent signs in $VCC_CC

diff --git a/configure.ac b/configure.ac
index e3ead6bd7..2d3757755 100644
--- a/configure.ac
+++ b/configure.ac
@@ -810,7 +810,7 @@ else
 			break
 			;;
 		*cc)
-			VCC_CC="$PTHREAD_CC $OCFLAGS %w -errwarn=%all,no%E_STATEMENT_NOT_REACHED $PTHREAD_CFLAGS -Kpic -G -o %o %s"
+			VCC_CC="$PTHREAD_CC $OCFLAGS %w -errwarn=%%all,no%%E_STATEMENT_NOT_REACHED $PTHREAD_CFLAGS -Kpic -G -o %o %s"
 			;;
 		esac
 		;;