Update build-tools to ab/3763331

New prebuilts for the kati upstream merge. Major changes are:

 * Add .KATI_NINJA_POOL to set custom pools for kati rules
 * Addition of --color_warnings to colorize warning/error messages
 * Better FindEmulator Warnings
 * Be more resilient to directories disappearing during startup
 * Better CPU affinity when running more than one instance of kati

Test: m -j blueprint_tools  (compare generated ninja file before/after)
Test: USE_SOONG_UI=true m -j (with --color_warning patch)
Test: multiproduct_build
Change-Id: I2e2481147efd96e276ba5ac0efd3a98f2cd33cd5