add basic .gitattributes files to notice whitespace issues

gcc/testsuite/ChangeLog:

2016-04-22  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* .gitattributes: New file.

/ChangeLog:

2016-04-22  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* .gitattributes: New file.

From-SVN: r235381

.gitattributes

+*.{c,C,cc,h} whitespace=indent-with-non-tab,space-before-tab,trailing-space

ChangeLog

+2016-04-22  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+	* .gitattributes: New file.
+
 2016-04-22  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* MAINTAINERS (rs6000/powerpc port): Add myself.

gcc/testsuite/.gitattributes

+* -whitespace

gcc/testsuite/ChangeLog

+2016-04-22  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+	* .gitattributes: New file.
+
 2016-04-22  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* lib/gcc-dg.exp (${tool}_load): Add default return value handler.