libunwindstack: add missing header for abort()

This is to fix build error like
https://ci.chromium.org/ui/p/chromium/builders/try/android-x86-rel/465071/overview

Bug: 376278210
Change-Id: Ie6097d655739e64dcd0609c540975d1fea86a5b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/third_party/libunwindstack/+/6022039
Reviewed-by: Mike Wittman <wittman@chromium.org>
diff --git a/README.chromium b/README.chromium
index 329fe13..66fa06e 100644
--- a/README.chromium
+++ b/README.chromium
@@ -224,3 +224,7 @@
   Handle the case where process_vm_readv is not available, given it is gated
   on __ANDROID_API__ >= 23 in
   third_party/android_toolchain/ndk/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/sys/uio.h
+
+- `0019-add-missing-include-in-regsinfo-header.patch`:
+
+  Add a missing include for abort() in RegsInfo.h.
diff --git a/patches/0019-add-missing-include-in-regsinfo-header.patch b/patches/0019-add-missing-include-in-regsinfo-header.patch
new file mode 100644
index 0000000..ebbbcae
--- /dev/null
+++ b/patches/0019-add-missing-include-in-regsinfo-header.patch
@@ -0,0 +1,12 @@
+diff --git a/src/libunwindstack/RegsInfo.h b/src/libunwindstack/RegsInfo.h
+index 28b297e..d6f495b 100644
+--- a/src/libunwindstack/RegsInfo.h
++++ b/src/libunwindstack/RegsInfo.h
+@@ -17,6 +17,7 @@
+ #pragma once
+ 
+ #include <stdint.h>
++#include <stdlib.h>
+ 
+ #include <unwindstack/Regs.h>
+ 
diff --git a/src/libunwindstack/RegsInfo.h b/src/libunwindstack/RegsInfo.h
index 28b297e..d6f495b 100644
--- a/src/libunwindstack/RegsInfo.h
+++ b/src/libunwindstack/RegsInfo.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <stdlib.h>
 
 #include <unwindstack/Regs.h>