Respect CFLAGS, don't strip binaries

http://bugs.gentoo.org/show_bug.cgi?id=252124

--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -10,5 +10,6 @@
 	modify.c modify.h \
 	misc.h define.h
 
-LIBS = @GTK_LIBS@
-AM_CFLAGS = -s -O2 -Wall @GTK_CFLAGS@ -DLOCALEDIR=\"$(datadir)/locale\"
+selectwm_LDADD = @GTK_LIBS@
+selectwm_CFLAGS = @GTK_CFLAGS@
+selectwm_CPPFLAGS = -DLOCALEDIR=\"$(datadir)/locale\"