Ignore warnings to enable llvm15

Issue: #I6LPWU
Signed-off-by: Nguzhihao4 <guzhihao4@huawei.com>
Change-Id: I078eecb876a9a980a3f94c8999a85b470b795599

interfaces/innerkits/c/ipc/BUILD.gn

@@ -124,6 +124,7 @@ if (ohos_kernel_type == "liteos_m") {
       "-lpthread",
     ]
     cflags = [ "-fPIC" ]
+    cflags += [ "-Wno-int-conversion" ]
     cflags_cc = cflags
     public_deps = [
       ":rpc_log",
@@ -168,6 +169,7 @@ if (ohos_kernel_type == "liteos_m") {
       "-lpthread",
     ]
     cflags = [ "-fPIC" ]
+    cflags += [ "-Wno-int-conversion" ]
     cflags_cc = cflags
     public_deps = [
       ":rpc_log",