Added support for acquiring CAP_BLOCK_SUSPEND capability

Linux kernel 3.10 onward power service mandates the user
space processes that use wake_lock service to have
CAP_BLOCK_SUSPEND capability. Made changes in rild
process to acquire the same

Change-Id: Ia1f83c7fc30bf15219cda97ea05fc42b5d55afaf
CRs-Fixed: 684559
diff --git a/rild/rild.c b/rild/rild.c
index 9670d27..66b48d0 100644
--- a/rild/rild.c
+++ b/rild/rild.c
@@ -38,6 +38,7 @@
 #define LIB_PATH_PROPERTY   "rild.libpath"
 #define LIB_ARGS_PROPERTY   "rild.libargs"
 #define MAX_LIB_ARGS        16
+#define MAX_CAP_NUM         ((CAP_LAST_CAP % 32) + 1)
 
 static void usage(const char *argv0)
 {
@@ -101,7 +102,7 @@
     header.version = _LINUX_CAPABILITY_VERSION_3;
     header.pid = 0;
 
-    struct __user_cap_data_struct data[2];
+    struct __user_cap_data_struct data[MAX_CAP_NUM];
     memset(&data, 0, sizeof(data));
 
     data[CAP_TO_INDEX(CAP_NET_ADMIN)].effective |= CAP_TO_MASK(CAP_NET_ADMIN);
@@ -110,6 +111,9 @@
     data[CAP_TO_INDEX(CAP_NET_RAW)].effective |= CAP_TO_MASK(CAP_NET_RAW);
     data[CAP_TO_INDEX(CAP_NET_RAW)].permitted |= CAP_TO_MASK(CAP_NET_RAW);
 
+    data[CAP_TO_INDEX(CAP_BLOCK_SUSPEND)].effective |= CAP_TO_MASK(CAP_BLOCK_SUSPEND);
+    data[CAP_TO_INDEX(CAP_BLOCK_SUSPEND)].permitted |= CAP_TO_MASK(CAP_BLOCK_SUSPEND);
+
     if (capset(&header, &data[0]) == -1) {
         RLOGE("capset failed: %s", strerror(errno));
         exit(EXIT_FAILURE);