Limit LTO inlining even when profile is present

Reduce the import instr limit from the LLVM default (100) to 40. This
helps reduce the binary size as well as improving performance slightly.

Size:
             Default(100)   40        30
libhwui.so   11059040       11058912  11060872
libart.so    10697576       10697160  10696568

Performance:
40 vs. default:  0.37% improvement
                 http://go/art-benchmark?p=BootImageProfileId:36054
30 vs. default:  0.36% improvement
                 http://go/art-benchmark?p=BootImageProfileId:36058

Test: presubmit
Change-Id: Id800ff7818cde908daab784bac0a312c6a71272d