Merge pull request #4346 from krishnakumarg1984/kg/c_cpp_split_dwarf

ignore split-dwarf debugging-related auxilary .dwo files for C and C+…

C++.gitignore

@@ -36,3 +36,6 @@
 *.exe
 *.out
 *.app
+
+# debug information files
+*.dwo

C.gitignore

@@ -50,3 +50,6 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+
+# debug information files
+*.dwo