libjpeg_turbo: Add linux include for android GN build.

linux and android should share same yasm defines and include_dirs,
just as src/third_party/libjpeg_turbo/libjpeg.gyp does.

BUG=455151

Review URL: https://codereview.chromium.org/893413002

Cr-Commit-Position: refs/heads/master@{#314719}

build/secondary/third_party/libjpeg_turbo/BUILD.gn

@@ -84,7 +84,7 @@ if (cpu_arch == "x86" || cpu_arch == "x64") {
     } else if (is_mac) {
       defines += [ "MACHO" ]
       include_dirs = [ "mac" ]
-    } else if (is_linux) {
+    } else if (is_linux || is_android) {
       defines += [ "ELF" ]
       include_dirs = [ "linux" ]
     }