[wasm] Make {RelocInfo::WASM_CALL} shareable.

R=clemensh@chromium.org

Change-Id: I89339f2d9035d1882e8d29a9119f1bc2d68927e5
Reviewed-on: https://chromium-review.googlesource.com/1105759Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53879}

src/assembler.h

@@ -431,8 +431,8 @@ class RelocInfo {
     EMBEDDED_OBJECT,  // LAST_GCED_ENUM
 
     JS_TO_WASM_CALL,
-    WASM_CALL,
-    WASM_STUB_CALL,  // FIRST_SHAREABLE_RELOC_MODE
+    WASM_CALL,  // FIRST_SHAREABLE_RELOC_MODE
+    WASM_STUB_CALL,
 
     RUNTIME_ENTRY,
     COMMENT,
@@ -471,7 +471,7 @@ class RelocInfo {
     FIRST_REAL_RELOC_MODE = CODE_TARGET,
     LAST_REAL_RELOC_MODE = VENEER_POOL,
     LAST_GCED_ENUM = EMBEDDED_OBJECT,
-    FIRST_SHAREABLE_RELOC_MODE = WASM_STUB_CALL,
+    FIRST_SHAREABLE_RELOC_MODE = WASM_CALL,
   };
 
   STATIC_ASSERT(NUMBER_OF_MODES <= kBitsPerInt);