[gn] Don't use PIE for host executables

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index b737883542b372d4cf7e2b7aa95f6fc45b1483d3..67ec024242578befb351d3a82a10af7fb742a80e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -2171,6 +2171,9 @@ if (current_toolchain == v8_snapshot_toolchain) {
   v8_executable("mksnapshot") {
     visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
+    # This is executed on the host only and doesn't require PIE.
+    want_pie = false
+
     sources = [
       "src/snapshot/mksnapshot.cc",
     ]
@@ -2193,6 +2196,9 @@ v8_executable("mkpeephole") {
   # bytecodes that are described in bytecodes.{cc,h}.
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
+  # This is executed on the host only and doesn't require PIE.
+  want_pie = false
+
   sources = [
     "src/interpreter/bytecode-peephole-optimizer.h",
     "src/interpreter/bytecodes.cc",