remake: add -fcommon to CFLAGS

Fixes #2227

remake/PKGBUILD

@@ -5,7 +5,7 @@ conflicts=("remake-git")
 replaces=("remake-git")
 _remakever="dbg-1.5"
 pkgver=4.3+dbg1.5
-pkgrel=1
+pkgrel=2
 pkgdesc="Enhanced GNU Make - tracing, error reporting, debugging, profiling and more"
 arch=('i686' 'x86_64')
 url="https://github.com/rocky/remake"
@@ -28,6 +28,7 @@ prepare() {
 
 build() {
   cd ${srcdir}/${pkgname}-4.3+${_remakever}
+  CFLAGS+=" -fcommon"
   ./configure \
     --prefix=/usr \
     --build=${CHOST} \