Use -fPIC instead of -fpic when generating PIC code.

This avoids relocation overflows in sparc/sparc64 targets while
linking,  where the reachable data using -fpic is only 4kb.

Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 97f295e..2219eaa 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -28,7 +28,7 @@
 ## not, see <http://www.gnu.org/licenses/>.
 ##
 include $(top_srcdir)/config/eu.am
-AM_CFLAGS += -fpic
+AM_CFLAGS += -fPIC
 AM_CPPFLAGS += -I$(srcdir)/../libelf
 
 noinst_LIBRARIES = libeu.a