Fix spelling of stackcollapse in comments

s/stackcolllapse/stackcollapse/g. This seems to have been copy pasted
across a bunch of files.

dev/hcstackcollapse.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# hcstackcolllapse.pl	collapse hot/cold multiline stacks into single lines.
+# hcstackcollapse.pl	collapse hot/cold multiline stacks into single lines.
 #
 # EXPERIMENTAL: This is a work in progress, and may not work properly.
 #

stackcollapse-go.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-go.pl  collapse golang samples into single lines.
+# stackcollapse-go.pl  collapse golang samples into single lines.
 #
 # Parses golang smaples generated by "go tool pprof" and outputs stacks as
 # single lines, with methods separated by semicolons, and then a space and an

stackcollapse-jstack.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-jstack.pl	collapse jstack samples into single lines.
+# stackcollapse-jstack.pl	collapse jstack samples into single lines.
 #
 # Parses Java stacks generated by jstack(1) and outputs RUNNABLE stacks as
 # single lines, with methods separated by semicolons, and then a space and an

stackcollapse-ljp.awk

@@ -1,6 +1,6 @@
 #!/usr/bin/awk -f
 #
-# stackcolllapse-ljp.awk	collapse lightweight java profile reports
+# stackcollapse-ljp.awk	collapse lightweight java profile reports
 #				into single lines stacks.
 #
 # Parses a list of multiline stacks generated by:

stackcollapse-perf.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-perf.pl	collapse perf samples into single lines.
+# stackcollapse-perf.pl	collapse perf samples into single lines.
 #
 # Parses a list of multiline stacks generated by "perf script", and
 # outputs a semicolon separated stack followed by a space and a count.

stackcollapse-stap.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-stap.pl	collapse multiline SystemTap stacks
+# stackcollapse-stap.pl	collapse multiline SystemTap stacks
 #				into single lines.
 #
 # Parses a multiline stack followed by a number on a separate line, and

stackcollapse.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse.pl	collapse multiline stacks into single lines.
+# stackcollapse.pl	collapse multiline stacks into single lines.
 #
 # Parses a multiline stack followed by a number on a separate line, and
 # outputs a semicolon separated stack followed by a space and the number.