gopprof: update list of memory allocation functions

R=r, r2
CC=golang-dev
https://golang.org/cl/4275057

src/cmd/prof/gopprof

@@ -2416,11 +2416,17 @@ sub RemoveUninterestingFrames {
                       'makechan',
                       'makemap',
                       'mal',
-                      'mallocgc',
+                      'runtime.new',
+                      'makeslice1',
+                      'runtime.gostringsize',
+                      'runtime.malloc',
+                      'unsafe.New',
+                      'runtime.mallocgc',
                       'runtime.catstring',
                       'runtime.ifaceT2E',
                       'runtime.ifaceT2I',
                       'runtime.makechan',
+                      'runtime.makechan_c',
                       'runtime.makemap',
                       'runtime.makeslice',
                       'runtime.mal',