Fix the help printouts in scripts

Printing '<triple>' causes the shell to try to read a file named
triple. One could either quote it, or just remove the angle brackets;
removing the brackets for simplicity.

build-llvm.sh

@@ -45,7 +45,7 @@ while [ $# -gt 0 ]; do
 done
 if [ -z "$CHECKOUT_ONLY" ]; then
     if [ -z "$PREFIX" ]; then
-        echo $0 [--enable-asserts] [--full-llvm] [--host=<triple>] dest
+        echo $0 [--enable-asserts] [--full-llvm] [--host=triple] dest
         exit 1
     fi
 

build-make.sh

@@ -32,7 +32,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 [--host=<triple>] dest
+    echo $0 [--host=triple] dest
     exit 1
 fi
 

build-mingw-w64-tools.sh

@@ -34,7 +34,7 @@ while [ $# -gt 0 ]; do
 done
 if [ -z "$CHECKOUT_ONLY" ]; then
     if [ -z "$PREFIX" ]; then
-        echo $0 [--skip-include-triplet-prefix] [--host=<triple>] dest
+        echo $0 [--skip-include-triplet-prefix] [--host=triple] dest
         exit 1
     fi
 

install-wrappers.sh

@@ -30,7 +30,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 [--host=<triple>] dest
+    echo $0 [--host=triple] dest
     exit 1
 fi
 mkdir -p "$PREFIX"

strip-llvm.sh

@@ -30,7 +30,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 [--host=<triple>] dir
+    echo $0 [--host=triple] dir
     exit 1
 fi
 cd "$PREFIX"