simpleperf: use string to store vaddr in report.html.

The file vaddrs in vmlinux may can't be represented precisely by double
type in Javascript. So store vaddrs as hex strings in json data, and
handle them using BigInt in report_html.js.

Bug: 186566291
Test: run script/test/test.py TestReportHtml*.
Test: run script/report_html.py manually.
Change-Id: Ic710d1795bb2269c0e2889ed9e9ea362f0cc0aa4
3 files changed