emulator: increase system partition size to 400M

300M is too small.

Change-Id: Icbe4e76d6e5c8a50cc6e6d74e324335bc66b8466
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index fd8c8a3..af51bc0 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 := 314572800
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
 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 659dc02..9678758 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 := 314572800
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
 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 709bdee..1a48aca 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 := 314572800
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 419430400
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 209715200
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4