Remove reference to LoopVectorization

[skip-ci]

contrib/bolt/Makefile

@@ -51,7 +51,7 @@ FILES_TO_OPTIMIZE := $(shell for file in $(SYMLINKS_TO_OPTIMIZE); do readlink $(
 
 AFTER_INSTRUMENT_MESSAGE:='Run `make finish_stage1` to finish off the build. $\
 	You can now optionally collect more profiling data by running Julia with an appropriate workload, $\
-	if you wish run `make clean_profiles` before to remove any profiling data generated by `make finish_stage1`. $\
+	if you wish, run `make clean_profiles` before doing so to remove any profiling data generated by `make finish_stage1`. $\
 	You should end up with some data in $(PROFILE_DIR). Afterwards run `make merge_data && make bolt`. $\
 
 $(STAGE0_BUILD) $(STAGE1_BUILD):

contrib/pgo-lto-bolt/Makefile

@@ -61,19 +61,18 @@ FILES_TO_OPTIMIZE := $(shell for file in $(SYMLINKS_TO_OPTIMIZE); do readlink $(
 
 AFTER_INSTRUMENT_MESSAGE:='Run `make finish_stage2` to finish off the build. $\
 	You can now optionally collect more profiling data by running Julia with an appropriate workload, $\
-	if you wish run `make clean_profiles` before to remove any profiling data generated by `make finish_stage2`. $\
+	if you wish, run `make clean_profiles` before doing so to remove any profiling data generated by `make finish_stage2`. $\
 	You should end up with some data in $(BOLT_PROFILE_DIR). Afterwards run `make merge_data && make bolt`. $\
 
 # When building a single libLLVM.so we need to increase -vp-counters-per-site
 # significantly
 COUNTERS_PER_SITE:=6
 # Note: profile counters are not atomic by default, https://discourse.llvm.org/t/profile-guided-optimization-pgo-related-questions-and-suggestions/75232/5
 
-AFTER_STAGE1_MESSAGE:='Run `make clean-profiles` to start with a clean slate. $\
-    Then run Julia to collect realistic profile data, for example: `$(STAGE1_BUILD)/julia -O3 -e $\
-    '\''using Pkg; Pkg.add("LoopVectorization"); Pkg.test("LoopVectorization")'\''`. This $\
-	should produce about 15MB of data in $(PGO_PROFILE_DIR). Note that running extensive $\
-	scripts may result in counter overflows, which can be detected by running $\
+AFTER_STAGE1_MESSAGE:='You can now optionally collect more profiling data for use in PGO by running Julia $\
+	with an appropriate workload. If you wish, run `make clean_profiles` before doing so to remove any profiling data $\
+	generated by building Julia. You should end up with about 15MB of data in $(PGO_PROFILE_DIR). $\
+	Note that running extensive scripts may result in counter overflows, which can be detected by running $\
 	`make top`. Afterwards run `make stage2`.'
 
 TOOLCHAIN_FLAGS = $\