physlock: unbreak build (#1779)

srcpkgs/physlock/template

@@ -1,7 +1,7 @@
 # Template file for 'physlock'
 pkgname=physlock
 version=0.4.5
-revision=2
+revision=3
 build_style=gnu-makefile
 short_desc="Lightweight linux console locking tool"
 maintainer="Eivind Uggedal <eivind@uggedal.com>"
@@ -11,5 +11,7 @@ distfiles="${homepage}/archive/v${version}.tar.gz"
 checksum=5ddb42553142c5e2b8744d086bb8f5bf131a29fc58b8886e825b80e6a456961c
 
 pre_build() {
-	sed -i 's|-o root -g root||' Makefile
+	sed -i Makefile \
+		-e 's/^CFLAGS\s*=/override CFLAGS +=/' \
+		-e 's|-o root -g root||'
 }