GitLab

This pulls in the following Native Client changes:

r13657: (sbc) Disable two glibc tests: tst-truncate and tst-truncate64
r13658: (jvoung) Avoid up/downloading scratch copy of pnaclmm.bc from generating libpnaclmm.a.
r13659: (mseaborn) Use uint32_t for untrusted pointer args: read() and write() syscalls
r13660: (mseaborn) PNaCl dynamic loader: Fix a corner case with mapping the BSS
r13661: (kschimpf) Update revision for PNaCl r13647->r13658
r13666: (dyen) Added initial implementation of the IRT extension interface.

BUG=none
TEST=browser_tests and nacl_integration
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_arm_cross_compile,linux_nacl_sdk_build
TBR=ncbray@chromium.org

Review URL: https://codereview.chromium.org/509703003

Cr-Commit-Position: refs/heads/master@{#292071}