Remove -lc++ link and document -fno-exceptions

Remove -lc++ link and document -fno-exceptions

-lc++ can cause link error on some systems and is not necessary on gcc 4.6+ so remove the link option and document how to build for gcc 4.4

TEST=CC=gcc-4.4 CXXFLAGS=-fno-exceptions CXX=g++-4.4 make -f linux.mk clean all
BUG=libyuv:616
Committed: https://chromium.googlesource.com/libyuv/libyuv/+/ff9b16b828712cd6aa4ddef3b419a604e17bd4a9

[fbarchard1, 2016-07-06 23:02:02]

Description was changed from

==========
remove c++ link and document no-exceptions

BUG=libyuv:616
==========

to

==========
Remove -lc++ link and document -fno-exceptions

-lc++ can cause link error on some systems and is not necessary on gcc 4.6+ so
remove the link option and document how to build for gcc 4.4

TEST=CC=gcc-4.4 CXXFLAGS=-fno-exceptions CXX=g++-4.4 make -f linux.mk clean all
BUG=libyuv:616
==========

[fbarchard1, 2016-07-06 23:02:19]

Description was changed from

==========
Remove -lc++ link and document -fno-exceptions

-lc++ can cause link error on some systems and is not necessary on gcc 4.6+ so
remove the link option and document how to build for gcc 4.4

TEST=CC=gcc-4.4 CXXFLAGS=-fno-exceptions CXX=g++-4.4 make -f linux.mk clean all
BUG=libyuv:616
==========

to

==========
Remove -lc++ link and document -fno-exceptions

-lc++ can cause link error on some systems and is not necessary on gcc 4.6+ so
remove the link option and document how to build for gcc 4.4

TEST=CC=gcc-4.4 CXXFLAGS=-fno-exceptions CXX=g++-4.4 make -f linux.mk clean all
BUG=libyuv:616

Committed:
https://chromium.googlesource.com/libyuv/libyuv/+/ff9b16b828712cd6aa4ddef3b41...
==========

[fbarchard1, 2016-07-06 23:02:21]

Committed patchset #1 (id:1) manually as
ff9b16b828712cd6aa4ddef3b419a604e17bd4a9 (presubmit successful).