sign_target_files_apks: rewrite build.prop correctly in eng builds

In eng builds, ro.display.id has many space separated items and was
resulting in an error when trying to rewrite it as 'value' gets
turned into a list and never converted back to a string.

Change-Id: I6c8633ed2eb52c56a4097992a32d53d80df4f844
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Merge "sign_target_files_apks: rewrite build.prop correctly in eng builds"
Enable NX protections

Add -Wa,--noexecstack and -Wl,-z,noexecstack as default
flags when compiling host-side applications.  This enables
NX protections, which prevent code from executing on the
stack or heap.  NX protections make exploiting memory
corruption issues more challenging and is an important
security feature.

Change-Id: Iae580abe887e01f9029ec2a4e0fc0aae496724a4
Fix regex for finding symbol data.

The new output of debuggerd removed a space between the #00 and the rest
of the line. The regex is very restrictive, so fixing it to handle the new
output.

Change-Id: I5259ae1e56a351608b330dfd858a2021e6d89358
Add an explicit definition of __ANDROID__=1

Once the aarch64 toolchain is refreshed this will be removed.
Also removed some CFLAG duplications.

Change-Id: I42fd86931263af82042ea696196fb25e948fe9cb
Merge "Add an explicit definition of __ANDROID__=1"
Merge "Fix regex for finding symbol data."
Merge "Enable NX protections"
enable PIE for dynamically linked Linux host executables

Compile all host programs for Android with -fPIE and -pie. This
enables PIE (Position Independent Executables), which helps
protect these applications from exploitation due to memory
management bugs.

Note: PIE *static* executables are not supported at this time. darwin
and windows are also not supported.

Change-Id: I67c1be297711ea23064c349f97ebd02eef3eff09
Merge "enable PIE for dynamically linked Linux host executables"
Merge android master into master.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>