Add x86 bots to the read64le party

thestig@ reminds me we do have linux x86 bots on the waterfall. Add them
to the read64le party. Minor: run git cl format over BUILD.gn, and add a
line space here and there for readability.

Bug: 760853
Change-Id: Ia47296a26bff77f9be699e31053d8b94aac583f4
Reviewed-on: https://chromium-review.googlesource.com/910328Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535612}

third_party/zlib/BUILD.gn

@@ -56,11 +56,10 @@ source_set("zlib_adler32_simd") {
 
 config("zlib_inflate_chunk_simd_config") {
   if (!is_ios && (current_cpu == "x86" || current_cpu == "x64")) {
-    defines = [ "INFLATE_CHUNK_SIMD_SSE2" ]
-
-    if (current_cpu == "x64") {
-      defines += [ "INFLATE_CHUNK_READ_64LE" ]
-    }
+    defines = [
+      "INFLATE_CHUNK_READ_64LE",
+      "INFLATE_CHUNK_SIMD_SSE2",
+    ]
   }
 
   if (current_cpu == "arm" || current_cpu == "arm64") {
@@ -242,6 +241,7 @@ static_library("zlib") {
 
 config("minizip_warnings") {
   visibility = [ ":*" ]
+
   if (is_clang) {
     # zlib uses `if ((a == b))` for some reason.
     cflags = [ "-Wno-parentheses-equality" ]
@@ -266,6 +266,7 @@ static_library("minizip") {
       "contrib/minizip/iowin32.h",
     ]
   }
+
   if (is_mac || is_ios || is_android || is_nacl) {
     # Mac, Android and the BSDs don't have fopen64, ftello64, or fseeko64. We
     # use fopen, ftell, and fseek instead on these systems.
@@ -303,7 +304,7 @@ executable("zlib_bench") {
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   deps = [
-    "//build/config:exe_and_shlib_deps",
     ":zlib",
+    "//build/config:exe_and_shlib_deps",
   ]
 }