configure: add --(disable|enable)-dependency-tracking

defaults to enabled. when disabled skips dependency file (.d) generation
allowing for faster one-time builds.

Change-Id: I2d7d7f905f1663315b8eb2b2e81fffb6fcb15829
diff --git a/configure b/configure
index 88df374..f3708f9 100755
--- a/configure
+++ b/configure
@@ -209,6 +209,7 @@
 
 enable_feature static
 enable_feature optimizations
+enable_feature dependency_tracking
 enable_feature fast_unaligned #allow unaligned accesses, if supported by hw
 enable_feature spatial_resampling
 enable_feature multithread
@@ -286,6 +287,7 @@
     emulate_hardware
 "
 CONFIG_LIST="
+    dependency_tracking
     external_build
     install_docs
     install_bins
@@ -344,6 +346,7 @@
     ${EXPERIMENT_LIST}
 "
 CMDLINE_SELECT="
+    dependency_tracking
     external_build
     extra_warnings
     werror