Dockerfile: Update building trace tools slightly

We have not been picking a tag for the trace-cmd build process.
Currently the tip of libtraceevent fails to build. Address both problems
here by picking recent stable tags for libtraceevent and libtracefs
(trace-cmd has no recent tags). Further, as it is often reported that
this fails to build due to a race, stop using "make -j$(nproc)" as this
is also small enough of a set of builds to not be an issue.

Signed-off-by: Tom Rini <trini@konsulko.com>

tools/docker/Dockerfile

@@ -311,17 +311,19 @@ RUN git clone https://github.com/stefanberger/swtpm /tmp/swtpm && \
 
 # Build trace-cmd
 RUN mkdir /tmp/trace && \
-    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git /tmp/trace/libtraceevent && \
+    git clone --depth=1 https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git /tmp/trace/libtraceevent \
+	-b libtraceevent-1.8.6 && \
     cd /tmp/trace/libtraceevent && \
-    make -j$(nproc) && \
+    make && \
     sudo make install && \
-    git clone https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git /tmp/trace/libtracefs && \
+    git clone --depth=1 https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git /tmp/trace/libtracefs \
+	-b libtracefs-1.8.2 && \
     cd /tmp/trace/libtracefs && \
-    make -j$(nproc) && \
+    make && \
     sudo make install && \
     git clone https://github.com/rostedt/trace-cmd.git /tmp/trace/trace-cmd && \
     cd /tmp/trace/trace-cmd && \
-    make -j$(nproc) && \
+    make && \
     sudo make install && \
     rm -rf /tmp/trace