Enable named mmap usage on Android
Enable named mmap usage on Android

Naming 'anonymous' mmap memory, which we use for Reactor's executable
memory, enables profilers to attribute JIT-compiled routine execution
to SwiftShader.

Bug: b/174801963
Change-Id: I3b1558fb89d1cac42f65be0609cfa5ac2a8319ef
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/52129
Tested-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Reviewed-by: Jason Macnak <76caa58940b8c6785e996f522e85b625ac7c7baa@google.com>
Reviewed-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Kokoro-Result: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

google/swiftshader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader