build: separate -debug and -release build timing

Producing `.o` from `.ji` files takes a massive amount of memory (currently),
so it's likely to lead to less memory thrashing and OOM-kills to do this step in serial

.circleci/config.yml

@@ -43,7 +43,7 @@ jobs:
  contrib/download_cmake.sh &&
  make -j3 -C deps || make
  - run: | # build julia, output ccache stats when done
- make -j3 all &&
+ make -j3 release &&
  make prefix=/tmp/julia install &&
  ccache -s &&
  make build-stats

.freebsdci.sh

@@ -32,7 +32,7 @@ compile(){
  export USECCACHE=1
 
  gmake check-whitespace
- gmake all -j $MAKE_JOBS_NUMBER
+ gmake release -j $MAKE_JOBS_NUMBER
 }
 
 runtests(){

.travis.yml

@@ -127,6 +127,7 @@ script:
  echo "-- end of deps build log -----------------------------------------------";
  false; }
  # compile / install Julia
+ - make $BUILDOPTS NO_GIT=1 prefix=/tmp/julia release | moreutils/ts -s "%.s"
  - make $BUILDOPTS NO_GIT=1 prefix=/tmp/julia install | moreutils/ts -s "%.s"
  - make $BUILDOPTS NO_GIT=1 build-stats
  - du -sk /tmp/julia/*

contrib/windows/appveyor_build.sh

@@ -215,7 +215,7 @@ fi
 echo 'FORCE_ASSERTIONS = 1' >> Make.user
 
 cat Make.user
-make -j3 VERBOSE=1 all
+make -j3 VERBOSE=1 release
 make -j3 VERBOSE=1 install
 make VERBOSE=1 JULIA=../../usr/bin/julia.exe BIN=. "$(make print-CC)" -C test/embedding release
 cp usr/bin/busybox.exe julia-*/bin