main/gcc: fix c89/c99 wrappers

Prevent variables in the here-document from being expanded.
Keep indentation and use $() for consistency.

main/gcc/APKBUILD

@@ -6,7 +6,7 @@ pkgver=6.4.0
 [ "$CHOST" != "$CTARGET" ] && _target="-$CTARGET_ARCH" || _target=""
 
 pkgname="$pkgname$_target"
-pkgrel=6
+pkgrel=7
 pkgdesc="The GNU Compiler Collection"
 url="http://gcc.gnu.org"
 arch="all"
@@ -393,7 +393,7 @@ package() {
 		done
 	else
 		# add c89/c99 wrapper scripts
-		cat >"$pkgdir"/usr/bin/c89 <<EOF
+		cat >"$pkgdir"/usr/bin/c89 <<'EOF'
 #!/bin/sh
 fl="-std=c89"
 for opt; do
@@ -405,13 +405,13 @@ for opt; do
 done
 exec gcc $fl ${1+"$@"}
 EOF
-		cat >"$pkgdir"/usr/bin/c99 <<-EOF
+		cat >"$pkgdir"/usr/bin/c99 <<'EOF'
 #!/bin/sh
 fl="-std=c99"
 for opt; do
 	case "$opt" in
 	-std=c99|-std=iso9899:1999) fl="";;
-	-std=*) echo "`basename $0` called with non ISO C99 option $opt" >&2
+	-std=*) echo "$(basename $0) called with non ISO C99 option $opt" >&2
 		exit 1;;
 	esac
 done