lttng-ust: Update to 2.10.3

Unlike the current version, this one has support for aarch64. aarch64 is
necessary for several 64-bit targets.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/lttng-ust/patches/001-no_docs_tests.patch

@@ -1,7 +1,7 @@
 --- a/Makefile.am
 +++ b/Makefile.am
-@@ -20,8 +20,6 @@ if BUILD_JAVA_AGENT
- SUBDIRS += liblttng-ust-java-agent
+@@ -26,8 +26,6 @@ SUBDIRS += python-lttngust \
+ 		liblttng-ust-python-agent
  endif
  
 -SUBDIRS += tests doc