emulator: increase system partition to 550M

Yes, 400M isn't enough. I can't believe it either.

Change-Id: I7d3857f04bfda472af6a281017204672bb9c9940
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index af51bc0..3bd4f31 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -46,7 +46,7 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 576716800
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 209715200
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index 9678758..e6f43af 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -50,7 +50,7 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 576716800
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 209715200
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/board/generic_x86/BoardConfig.mk b/target/board/generic_x86/BoardConfig.mk
index 1a48aca..ed7da38 100644
--- a/target/board/generic_x86/BoardConfig.mk
+++ b/target/board/generic_x86/BoardConfig.mk
@@ -35,7 +35,7 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 576716800
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 209715200
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4