trousers: use -lmetrics

metrics-$BASE_VER will has $BASE_VER suffix removed.

BUG=chromium:920513
TEST=CQ

Change-Id: I7f208d10b2f7afa1d498cf671a9409004f53e11e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/trousers/+/2335920
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Qijiang Fan <fqj@google.com>
Tested-by: Qijiang Fan <fqj@google.com>
diff --git a/src/tcsd/Makefile.am b/src/tcsd/Makefile.am
index f780050..8b87df1 100644
--- a/src/tcsd/Makefile.am
+++ b/src/tcsd/Makefile.am
@@ -3,7 +3,7 @@
 BASE_VER ?= 307740
 
 tcsd_CFLAGS=-DAPPID=\"TCSD\" -DVAR_PREFIX=\"@localstatedir@\" -DETC_PREFIX=\"@sysconfdir@\" -I${top_srcdir}/src/include -fPIE -DPIE
-tcsd_LDADD=${top_builddir}/src/tcs/libtcs.a ${top_builddir}/src/tddl/libtddl.a -lpthread @CRYPTOLIB@ -lmetrics-$(BASE_VER)
+tcsd_LDADD=${top_builddir}/src/tcs/libtcs.a ${top_builddir}/src/tddl/libtddl.a -lpthread @CRYPTOLIB@ -lmetrics
 tcsd_LDFLAGS=-pie -Wl,-z,relro -Wl,-z,now
 
 tcsd_SOURCES=svrside.c tcsd_conf.c tcsd_threads.c platform.c