Rename md5.c to md5.cc, put its contents inside the google_breakpad namespace.

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@887 4c0a9323-5329-0410-9bdc-e9ce6186880e
diff --git a/Makefile.am b/Makefile.am
index 0415f59..cfb5757 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -69,7 +69,7 @@
 	src/client/linux/minidump_writer/minidump_writer.cc \
 	src/client/minidump_file_writer.cc \
 	src/common/convert_UTF.c \
-	src/common/md5.c \
+	src/common/md5.cc \
 	src/common/string_conversion.cc \
 	src/common/linux/file_id.cc \
 	src/common/linux/guid_creator.cc
@@ -870,7 +870,7 @@
 	src/common/mac/macho_walker.h \
 	src/common/mac/string_utilities.cc \
 	src/common/mac/string_utilities.h \
-	src/common/md5.c \
+	src/common/md5.cc \
 	src/common/md5.h \
 	src/common/solaris/dump_symbols.cc \
 	src/common/solaris/dump_symbols.h \