Makefile: add commented-out tweak to generate link map

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/Makefile.am b/Makefile.am
index aa1a5f4..6324913 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,6 +20,8 @@
 		 scsi.c stream.c block.c pathtrace.c mtd.c vsprintf.c \
 		 loop.c
 noinst_HEADERS = defs.h
+# Enable this to get link map generated
+#strace_CFLAGS = $(AM_CFLAGS) -Wl,-Map=strace.mapfile
 
 EXTRA_DIST = $(man_MANS) errnoent.sh signalent.sh syscallent.sh ioctlsort.c \
 	     debian/changelog debian/compat debian/control debian/copyright \