[TurboProp] Enable concurrent_inlining with TurboProp

Enabling concurrent inlining builds the graph on background thread
reducing the time spent on main thread.

Bug: v8:9684
Change-Id: Iee00aa991ab8e14fad76b0d9c0b0fd9f8d1eecde
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1937149Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65202}

src/flags/flag-definitions.h

@@ -484,6 +484,7 @@ DEFINE_BOOL(trace_generalization, false, "trace map generalization")
 DEFINE_BOOL(turboprop, false,
             "enable experimental turboprop mid-tier compiler.")
 DEFINE_NEG_IMPLICATION(turboprop, turbo_inlining)
+DEFINE_IMPLICATION(turboprop, concurrent_inlining)
 DEFINE_VALUE_IMPLICATION(turboprop, interrupt_budget, 10 * KB)
 
 // Flags for concurrent recompilation.