Give all of the modem plug-ins a better chance to build on MacOS X

src/modems/Makefile

@@ -7,6 +7,7 @@ CPPFLAGSF= -I ../../include
 CPPFLAGS=
 CFLAGSF	= -W `pkg-config --cflags glib-2.0`
 CFLAGS	= -Wall -g -O2 -pedantic -fPIC
+LDFLAGSF= `pkg-config --libs glib-2.0`
 AR	?= ar
 RANLIB	?= ranlib
 CCSHARED?= $(CC) -shared

src/modems/project.conf

@@ -3,6 +3,7 @@ cppflags_force=-I ../../include
 cppflags=
 cflags_force=-W `pkg-config --cflags glib-2.0`
 cflags=-Wall -g -O2 -pedantic -fPIC
+ldflags_force=`pkg-config --libs glib-2.0`
 includes=hayes.h
 dist=Makefile,osmocom.c