Add csafe and cppsafe executables with sanitizers support

sql/files/defaultdata/cppsafe/build

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+#!/bin/sh
+# nothing to compile

sql/files/defaultdata/cppsafe/run

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+#!/bin/sh
+
+# C++ compile wrapper-script for 'compile.sh'.
+# See that script for syntax and more info.
+
+DEST="$1" ; shift
+MEMLIMIT="$1" ; shift
+
+# Add -DONLINE_JUDGE or -DDOMJUDGE below if you want it make easier for teams
+# to do local debugging.
+
+# -x c++:   Explicitly set compile language to C++ (no object files or
+#           other languages autodetected by extension)
+# -Wall:    Report all warnings
+# -fsanitize: Enable the specified Sanitizers, see https://github.com/google/sanitizers for the full documentation
+# -fPIE -pie -fno-omit-frame-pointer -fno-optimize-sibling-calls: Make code position independent and disable optimizations that may obfuscate the info provided by the 
+sanitizers
+# -g: Include debugging/symbol information in the executable, improves sanitizers output if an error is detected
+# -O2:      Level 2 optimizations (default for speed)
+# -pipe:    Use pipes for communication between stages of compilation
+g++ -x c++ -Wall -fsanitize=address,undefined -fPIE -pie -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -O2 -pipe -o "$DEST" "$@"
+exit $?

sql/files/defaultdata/csafe/build

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+#!/bin/sh
+# nothing to compile

sql/files/defaultdata/csafe/run

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+#!/bin/sh
+
+# C compile wrapper-script for 'compile.sh'.
+# See that script for syntax and more info.
+
+DEST="$1" ; shift
+MEMLIMIT="$1" ; shift
+
+# Add -DONLINE_JUDGE or -DDOMJUDGE below if you want it make easier for teams
+# to do local debugging.
+
+# -x c:     Explicitly set compile language to C (no C++ nor object files
+#           autodetected by extension)
+# -Wall:    Report all warnings
+# -fsanitize: Enable the specified Sanitizers, see https://github.com/google/sanitizers for the full documentation
+# -fPIE -pie -fno-omit-frame-pointer -fno-optimize-sibling-calls: make code position independent and disable optimizations that may obfuscate the info provided by the
+sanitizers
+# -g: Include debugging/symbol information in the executable, improves sanitizers output if an error is detected
+# -O2:      Level 2 optimizations (default for speed)
+# -g        have file names and line numbers included in warning messages
+# -pipe:    Use pipes for communication between stages of compilation
+# -lm:      Link with math-library (has to be last argument!)
+gcc -x c -Wall -fsanitize=address,undefined -fPIE -pie -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -O2 -pipe -o "$DEST" "$@" -lm
+exit $?