For cproj test-case, use glibc version xfail

2014-08-04  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/cproj-fails-with-broken-glibc.c: Use xfail for broken glibc
	version instead of required-target.
	* lib/target-supports.exp
	(check_effective_target_not_glibc_2_11_or_earlier): Replace by ...
	(check_effective_target_glibc_2_11_or_earlier): ... this.

	* doc/sourcebuild.texi (glibc, glibc_2_12_or_later)
	(glibc_2_11_or_earlier): Document effective-target keywords.

From-SVN: r213693

gcc/ChangeLog

+2014-08-04  Tom de Vries  <tom@codesourcery.com>
+
+	* doc/sourcebuild.texi (glibc, glibc_2_12_or_later)
+	(glibc_2_11_or_earlier): Document effective-target keywords.
+
 2014-08-07  Kugan Vivekanandarajah  <kuganv@linaro.org>
 
 	* config/arm/arm.c (bdesc_2arg): Fix typo.

gcc/testsuite/ChangeLog

+2014-08-04  Tom de Vries  <tom@codesourcery.com>
+
+	* gcc.dg/cproj-fails-with-broken-glibc.c: Use xfail for broken glibc
+	version instead of required-target.
+	* lib/target-supports.exp
+	(check_effective_target_not_glibc_2_11_or_earlier): Replace by ...
+	(check_effective_target_glibc_2_11_or_earlier): ... this.
+
 2014-08-07  Zhenqiang Chen  <zhenqiang.chen@arm.com>
 
 	* gcc.target/arm/get_address_cost_aligned_max_offset.c: New test.