Updated revision log

Author: cmaglie

build/shared/revisions.txt

@@ -13,6 +13,7 @@ ARDUINO 1.5.3 BETA
 * sam: Upgraded libsam, and added missing modules (CAN, ETH, etc.) (Thibaut Viard)
 * sam: Added compatibility for avr/pgmspace.h (Paul Stoffregen)
 * sam: Added serialEvent*() support
+* sam: Fixed micros() to work with inside interrupts. (stimmer)
 
 [libraries]
 * sam: Added CAN library (still in early stage of development) (Palliser)