libc/eglibc: fix missing LIBC_TRY_CC_OPTION definition (eglibc 2.15)

Upstream SVN is currently broken:
http://www.eglibc.org/svn/branches/eglibc-2_15/libc/

LIBC_TRY_CC_OPTION macro is not defined in aclocal.m4.
This patch fix the configure script.

Once upstream branch will be fixed this patch could be reverted.

Related patch (committed to eglibc trunk):
Use autoconf macro for testing compiler options with empty input
http://sourceware.org/ml/libc-alpha/2012-03/msg00816.html

Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>

diff -r 1f6c8e4b2b92 -r d10afc5bcc25
patches/eglibc/2_15/110-aclocal-LIBC_TRY_CC_OPTION.patch

diff -ru ltrace-0.5.3.org/Makefile.in ltrace-0.5.3/Makefile.in

--- ltrace-0.5.3.org/Makefile.in	2011-08-21 18:55:15.000000000 +0200

+++ ltrace-0.5.3/Makefile.in	2011-08-21 18:40:53.000000000 +0200

@@ -39,7 +40,7 @@

 		$(CC) $(LDFLAGS) $^ $(LIBS) -o $@

 libltrace.a: 	sysdeps/sysdep.o $(OBJ)

-		$(AR) rcv $@ $^

+		$(AR) rscv $@ $^

 $(OBJ):		sysdeps/sysdep.o