build: Minor - fix comments referring to old tools/ directory.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/scripts/acpi_extract_preprocess.py b/scripts/acpi_extract_preprocess.py
index 6ef7df0..2698118 100755
--- a/scripts/acpi_extract_preprocess.py
+++ b/scripts/acpi_extract_preprocess.py
@@ -6,7 +6,7 @@
 # Read a preprocessed ASL listing and put each ACPI_EXTRACT
 # directive in a comment, to make iasl skip it.
 # We also put each directive on a new line, the machinery
-# in tools/acpi_extract.py requires this.
+# in scripts/acpi_extract.py requires this.
 
 import re
 import sys
diff --git a/scripts/checkstack.py b/scripts/checkstack.py
index 62fef36..e86a649 100755
--- a/scripts/checkstack.py
+++ b/scripts/checkstack.py
@@ -7,7 +7,7 @@
 # This file may be distributed under the terms of the GNU GPLv3 license.
 
 # Usage:
-#   objdump -m i386 -M i8086 -M suffix -d out/rom16.o | tools/checkstack.py
+#   objdump -m i386 -M i8086 -M suffix -d out/rom16.o | scripts/checkstack.py
 
 import sys
 import re
diff --git a/scripts/layoutrom.py b/scripts/layoutrom.py
index 0fbec25..2454920 100755
--- a/scripts/layoutrom.py
+++ b/scripts/layoutrom.py
@@ -10,7 +10,7 @@
 
 # LD script headers/trailers
 COMMONHEADER = """
-/* DO NOT EDIT!  This is an autogenerated file.  See tools/layoutrom.py. */
+/* DO NOT EDIT!  This is an autogenerated file.  See scripts/layoutrom.py. */
 OUTPUT_FORMAT("elf32-i386")
 OUTPUT_ARCH("i386")
 SECTIONS
diff --git a/scripts/readserial.py b/scripts/readserial.py
index 4f29648..3333e84 100755
--- a/scripts/readserial.py
+++ b/scripts/readserial.py
@@ -6,7 +6,7 @@
 # This file may be distributed under the terms of the GNU GPLv3 license.
 
 # Usage:
-#   tools/readserial.py /dev/ttyUSB0 115200
+#   scripts/readserial.py /dev/ttyUSB0 115200
 
 import sys
 import time