Updated revision log

Author: cmaglie

build/shared/revisions.txt

@@ -9,6 +9,7 @@ ARDUINO 1.0.6 - not yet released
 * Backported String class from IDE 1.5.x (Matt Jenkins)
 * Backported Print class from IDE 1.5.x
 * Backported digitalPinToInterrupt macro from IDE 1.5.x
+* Added initVariant() hook to allow 3rd party variant-specific initialization
 
 [ide]
 * Added compatibility for IDE 1.5.x libraries layout